• The United States and China have been engaged in a trade war since 2018. The Trump administration imposed tariffs on billions of dollars worth of Chinese goods, and China retaliated with tariffs on billions of dollars worth of American goods. The trade war has had a negative impact on both economies, and it has led to uncertainty for businesses and consumers.

• The United States and Mexico have renegotiated the North American Free Trade Agreement (NAFTA). The new agreement, called the United States-Mexico-Canada Agreement (USMCA), was signed in November 2018 and went into effect on July 1, 2020. The USMCA includes new provisions on labor, environmental protection, and intellectual property rights.
• The United Kingdom has left the European Union. The UK officially left the EU on January 31, 2020, but it remains in a transition period until December 31, 2020. During this time, the UK and the EU are negotiating a new trade deal.
• The World Trade Organization (WTO) has been facing challenges. The WTO has been unable to reach consensus on a number of issues, including trade in agricultural products and subsidies for state-owned enterprises. This has led to concerns about the future of the WTO.

These are just some of the recent developments and policies regarding international trade and tariffs. The global trading system is facing a number of challenges, and it remains to be seen how these challenges will be resolved.

Here are some of the potential impacts of these developments and policies:

• The trade war between the United States and China could lead to higher prices for consumers and businesses. The tariffs imposed by both countries have raised the cost of goods and services, and this could lead to inflation.
• The renegotiation of NAFTA could lead to job losses in some sectors. The new agreement includes new provisions on labor and environmental protection, and this could lead to some businesses moving their operations out of Mexico.
• The UK's exit from the EU could lead to disruptions to trade. The UK and the EU are still negotiating a new trade deal, and it is unclear what the terms of the deal will be. This could lead to delays and increased costs for businesses that trade between the UK and the EU.
• The challenges facing the WTO could lead to a decline in global trade. The WTO is responsible for setting rules for international trade, and its inability to reach consensus on a number of issues could lead to a decline in trade. This could have a negative impact on the global economy.

The future of international trade is uncertain, but it is clear that the global trading system is facing a number of challenges. These challenges will need to be addressed if the global economy is to continue to grow.